Prof Dr Kees van den Bos (Social Psychology) wrote on Nu.nl (Dutch) about returning IS fighters. Is Dutch society prepared for the possible return of this group of citizens? In his book Waarom mensen radicaliseren (Dutch), he deals with the phenomenon of radicalisation.
According to Van den Bos, radical behavior stems from a fundamental sense of injustice. Radicalised people feel disadvantaged and not part of Western or Dutch society. This often leads to anger, and ultimately to radical behavior.
According to Van den Bos, it is important that the world view of 'returnees' changes and that they are able to see their enemy, for example citizens in Western society, as human beings. Human contact plays an important role in deradicalisation. By entering into a conversation with each other, and showing understanding for the other, a process of deradicalisation can slowly be initiated.